i am here with michelle, crystal and lindsey. you went to one of the most violent cities in america to see how technology can help us fight crime? >> that's right. i went to oakland, california which has the 5th highest crime rate and nearby richmond which is among the top 20 to look at some very innovative technology that they are looking to increase the eyes and ears of the police force on the street. so let's have a look these are some of california's toughest streets. >> i am not violating any law. >> in two san francisco bay area cities known for crime oakland and rimmond westbound. >> but now, police in both of these cities have high tech back-ups. electronic ears listening for gunfire, 24/7. he lectronic eyes monitoring police and perps alike. even the cars on this street. officer chris tong is patrolling the streets of richmond that. ding you hear is the sound of a license plate reader. watch what happens when he passes a stolen vehicle. >> it's just triggered on an unoccupied vehicle. turn around and take a look what we'